To get to "Payroll Manual Entry" you will go to Accounting-->Payroll-->Manual Entry.
Once on the Payroll Manual Entry Page you will want to select a date (as seen below in RED).
Employee Name (ORANGE): This is a list of all the employees available to assign payroll to.
Hours (YELLOW): You will enter in the number of hours you would like to add.
Commission, Bonus, Tips, Deductions (GREEN): You also have the option to add in any commissions, bonuses, tips, or deductions each employee received. All amounts are $.
Description (BLUE): Enter reason for manual payroll entry or a description of the job here
Actions (PURPLE): Once all information is complete you will click the "Add" button under Actions.